Scale.



c. HI HAPGoon.

SCALE.

APPLICATION FILED M^R.2,19r2.

Patented Feb. 19, 1918.

2 sHEsTs- SHEET-'1.

C. H. HAGOOD.

.SCALE.

APPLICATION mso umza. :912.

1,256,689. Patented Feb.l9, i918.

- Q J mwwm @LA @ENCE @i333 SCALE win. may @on ii: kumvifx tha mmmcic. H. HM imm, u sin? sgi the 'Uni-ized Sint/es, residing "iefi, iii i@ couniy of Lucas aus. State it@ .Jhicii Siiizjsctei s@ gioi; :is 5;@ ifcqi'agfe correo-- izion in 0i fait 'to i rrufsuieywiiicii am acc wiiihiii the daga c @qui @ci in ordixiuy Commmcii 'um Vmicus mams have Abeen esmfii im: @arresting sua-h scaies :for variations in i151 giuri-Aura @i which thOSQ .iequiring mai-wal. iii/igluffimnt 12H3 mmv. c@ man, 'though fei'iaiiz au "iustrfmiis depending pim im um aigu man eriiiiojveri.

tum

.My pi'esf invention 1 C the iaiief of :fidjiistmenis 'fciiou foy ci'umgcs in tcmgeiiiiiie .and 1 involves the Giubofiiiuicizlf, .in the sexie a?, Cb of ihr- Conmi'iuufs bmw tim ci.

2G 'izan-.ifs and h@ Qminieimiinning mecimixiim mi? ai iii 'mosvu'a zdapied tu @ori-uct not oniy iwi* dif" f cui-:e5 ,in die power or ifm the spi-mg; du@ to changes in @mwa-amm, but also 'foichanges in ih@ iength of im@ 4,5 spring (me i0 ih@ Sums. musa In the ziccomimnyiig drawings forming a part of iiiig zppicziiiou, naiv@ Shown my invention in :i piefed ferm ppiieci t0 n, weii known @p9 of Se. ,im 'iQimiy in sg da Vibe@ this Spec-.caiion :if Lamers Patent ii'i'zmimd Fei@ 19, 1918.

Serial NnA 6851978.

comiociou with en great variey of scaies, ami the, structure may be Changed or modi- .'ied in many reSpec-s wiihmit departing from the scope thereof as sei: forth in the {ONLY-willig' Claims,

ing now to die drawings Figure l is :i freut cisvaion af the Casing si *die @minfin-baiaDoing and indicating; mechaniim ai om." smile, 'the beam being shown in section and he @using broken away in parts to show the inrnai mechanism. 2 is im Qiaimion in pmtiui Section :it right angles i@ ih@ pian@ of Fim fi cm iii@ oisei; iin@ 2 2 o tha figura. is a, View of the scale in Side elevation.

in ih@ particuifei' farm of scala simsen t0 cmeiupii ,f my imentimg ih@ base i beam 5a comme i if; ieeivm @y scale pim. (37 und Comgguiinj imm as of" an ordinary foi expiaining my in ing; ciium Z3 Se@ mii 'l immiied iii i pon n s :cond

rbziimicing u e@ missin @mi hm omi a mei; rod RL fue l'zici il of which mesiie wih a "pinion ou he und of the drum shaft to rotate the dimm The cmmtrbaiziiicing .mechanism is vigibie ii'nough @nt mici buck windows 13, ii- @if iis @aging und 'iw. Chart msiy be 0bef' iufoug mii sind may sight apen- 'EB nii of "hz pmi@ iisiifibcd up i@ ,1111911 i uonstifuc-- 1B SCS. G

The spring Constwcied mici arranged no couuiimfbaiauce ih@ weight of the commoii'y iii *die seal@ g1 and 1S coimeced ai one und 'the Casing as ai; 1S? und ai the other @mi w u :segiiwn by mmm 'of n ri'bbmi 20, the Sffg'mint binp; iiiy Connected to a Scuoiid Segment 9.1 @ich in turn coniiccfl'efi by A bund m' ribbon Q2, and :i stirup Q3 to ih@ and. of *die boum 5 (see Figs. l and 2) ih@ Sigmeni; l?) :mii 2l constiuting an Ofsciiiziimy @mimicking men'xber which pix'otod in the @ailing i313. For this pui'pose die casing is pim'iciQd with fi pair of b zich e155' i? i, ou which isf; mounted a knife 2", ,.vhic'x @momia ihmugh 'the fsogjmei i9 ami a CnS-ting? hzwii'lgfj zin ojfsfsi. 2S i0 wi'xifh tim )wirt Qi attached zz Screw 29. The if? may be mali in any desixii nii iba :#cgi'len 21, the vsaaie. beam is formed of a pair of strips of metal 30, 3l, secured together as by rivets 32 throughout their length, themetal of the inner strip having a lesser coeiiicient of expansion than that or the outer strip and the tvvo forming in effect a thermostat. In practice I have found that steel may be used as the metal of the inner strip and brass as that of the outer strip, :though other metals or alloys may be employed having the necessary relation between their coetlicients of expansion.

A. shown more particularly in Fig. 2, a screwladjustment 33 is also provided between the spring and its attachment to the casing forth@ purpose of adjustingthe indication to zero by hand when the scale is rst set up.

'he operation of thelscale Will be as usual in scales of this character. The imposition of a- Weight upon the scale pan lowers the end of the beam Within the casing and the eect of the Weight is transmitted from the beam through the ribbon 22, segment 2l, segment 19 and ribbon 20 to the spring 17, which is extended until it counterbalances .the Weight of the commodity, when the `Weight indication and' value computation may be read upon the chart as usual.

Til/Yhenever the temperature of the scale rises and the. spring is thereby expanded and its tension diminished, the strips composing the segmentl 2l are also expanded, but in diterent degrees proportional to the coeiiicients of expansion of the metals oi which they are composed, the outer strip, however, expanding at a great-er rate'than the. inner strip. 'lhe segment is thereby caused to bend or curve inward, or in other Words, its radius of curvature is reduced and it morev nearly, approaches the central pivot, the inward movement being greater as the point under consideration is more remote from the point of attachment of the segment. It follows from the consequent reduction of the radial distance of the point of application of the pull of the beam upon the segment, that the torsional eii'ect upon the oscillatory member and consequently the tension upon the spring, due to any given weight upon the scale pan,- is re duced. By properly choosing the metals employed and the dimensions of the strip which compose the thermostatic segment, the tension and length of the spring caused by variations in the surrounding temperature may be accurately neutralized. Many variations in the construction will of course suggest themselves to those skilled in the art, which variations are Within the scope of my invention. Thus the segment connected to the spring may be the thermostatic member, though in this event the positions of the metals would necessarily be reversed in order that the curve might expand with increase in temperature. Again ii"- a raelr and gear segment Were employed for either or the connections between the oscillating mem-- ber and the beam and spring respectively, the segmental gear 'would be forned oit the strips of metal having different coeliicieuts of expansion, the construction being an obvious one, from what has been stated above. These and many other modiiications which will suggest themselves are Within the scope of my invention.

I claim:

1. In a Weighing scale, a commodity' rce ceptacle and a load offsetting means, a lever member to the opposite arms of which said receptacle and means are respectively connected, said arms being respectively formed of materials having unequal expansion under increasing temperature whereby the relative radial distances or the points oi connection of the receptacle and load oil'- sett'ing means respectively are varied with variations 1n temperature.

2, In a Weighing scale having a cour modity receptacle and a load offsetting means` a lever member to the arms of which said receptacle and means are respectively connected, one of the arms of said'lever consisting of a curved bar attached at one end to the pivotal portion of said lever, and a connection from said arms to the receiver and means respectively, whereby an increase in temperature affects the radius oi. curvature of the curved arm and varies the ratio between the arms of the lever.

3. A weighing scale having a commodity receiver and a load oilisetting means, a lever to the arms of which said receiver and means are respectively connected, one of said arms being curved and composed of materials of unequal coelicients of expansion whereby af change in temperature changes the ratio of the arms of the lever.

4. A Weighing scale having a commodity receptacle and a load offsetting means, a le` ver to the arms of which said receptacle and means are respectivelyconnected, one ot the arms of said lever consisting of a curved bar attached at one end to the pivotal portion of the lever and composed. of strips ot' metal of unequal coefficients of expansion.

5. In a weighingscalc having a commodity receiver and a lload offsetting means, a pivoted lever member, one ol the arms of which consists of a curved bar, the radius of curvature oi which is substantially varied by changes in temperature whereby the effective length of said arm varied, and means for connecting the commodity receptacle and the load oil'setting moans to the arms or" the lever member.

6. A weighing scale having a commodityv receiver and a load offsetting means. a lever to the arms of which said connnmlity receptacle and load offsetting means are respectively connected, one of said arms being l' 5;.

tacle and a connection spring.

1%). A Weighing Scale having a receiver and a spring, a lever intermediate the same consisting of a' pair of segments, one of which segments is formed of av curved bar comprising strips of metal of unequal coeilicient-s of expansion and straps secured to said segments and coperating with the curved faces. thereof and also securedto the from the lever to the `spring and receiver respectively.

20. A weighing scale having a receiver and a spril'ig, a lever intermediate the same comprising a pair of segments, a strap connection from one of said segment-s to the spring, the other segment consisting of a f-mved bar composed of two metal strips of unequal coefiicients of expansion, that of the greater coefficient 'of expansion being on the out-side of the curve and a strapfastened to the free end of said bar passing over the periphery and secured to the receiver.

:21. A scale comprising a goods receiver, a spring counterbalance 17, an oscillatory member comprising two segments 19, 2l co11- neeted to the spring and goods receiver respectively, the segment 2l being formed of a pair of strips oli` metals having dilferent coefficients of expansion.

CLARENCE H. HAPGOOD.

vWitnesses J. D. B'UCKHOLDER, E. E. LONGENECKER. 

